(a) Duplexed temperature trace
(b) Raman spectra raw data (no step losses)
(c) Raman spectra raw data (typical step losses)
Figure 2: Synthetic data set. (a) Spatial distribution of temperatures used as the basis of the raw data. The data are duplexed about the midpoint of the fiber, as indicated by the shaded area on the right side of each plot. (b) An example of the ideal Raman spectra data for the specified temperature trace (no step loss). (c) A sample of the Raman spectra data including a step loss at 500 m.